import React, {Component, lazy, Suspense} from 'react';
import {NavLink, Route} from "react-router-dom";
import Loading from "../Loading/Loading";

const Home = lazy(() => import('../Home/Home'))
const About = lazy(() => import('../About/About'))


class Demo extends Component {
    render() {
        return (
            <div>
                <div className="row">
                    <div className="col-xs-offset-2 col-xs-8">
                        <div className="page-header"><h2>React Router Demo</h2></div>
                    </div>
                </div>
                <div className="row">
                    <div className="col-xs-2 col-xs-offset-2">
                        <div className="list-group">
                            <NavLink className="list-group-item" to="/about">About</NavLink>
                            <NavLink className="list-group-item" to="/home">Home</NavLink>
                        </div>
                    </div>
                    <div className="col-xs-6">
                        <div className="panel">
                            <div className="panel-body">
                                <Suspense fallback={<Loading></Loading>}>
                                    <Route path="/about" component={About}></Route>
                                    <Route path="/home" component={Home}></Route>
                                </Suspense>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        );
    }
}

export default Demo;